Friction behaviors and flow resistances of rock-ice avalanches | |
Dong, Zhi-bo1,3; Su, Li-jun1,2,3; Hu, Bing-li1,3; Miao, Shuai-sheng1,3 | |
刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY |
2024-04-01 | |
卷号 | 220页码:12 |
关键词 | Rock -ice avalanche Friction behavior Flow resistance Rotating drum |
ISSN号 | 0165-232X |
DOI | 10.1016/j.coldregions.2024.104130 |
英文摘要 | Rock-ice avalanches have high mobility and enormous destructive potential. However, the friction behaviors and flow resistance during the transition of flow regimes of the rock-ice avalanche remains an unsolved problem. Based on a series of measurements of normal, shear stress and pore water pressure at the rotating drum in a temperature-controllable laboratory, we quantify the influence of the ice content, particle size, drum velocity, and meltwater on the friction behaviors. The findings reveal that ice acts as a low-friction particle, leading to a significant reduction in frictional resistance of both particle-particle and particle-base. Furthermore, meltwater lubricates the particles and provides buoyancy, which also increases the mobility of the rock-ice avalanche. In addition, the augmentation of flow resistance is attributed to the increased particle size and drum velocity, thereby intensifying shear motion. In order to propose an unify theoretical model to calculate the flow resistance of rock-ice avalanche in various flow regimes. A heuristic model that relies on the extended dynamics theory is modified and can be well described the flow resistance of the tests involved in this paper. This study in the friction behaviors and flow resistance depending on the internal/external factors may be considered in hazard assessments of rock-ice avalanches in cold high-mountain regions. |
资助项目 | National Natural Science Foundation[U22A20603] ; National Key Research and Develop- ment Program of China[2023YFC3008300] |
WOS关键词 | FLUID PRESSURE ; LANDSLIDE ; MOBILITY ; MOTION |
WOS研究方向 | Engineering ; Geology |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001176655900001 |
资助机构 | National Natural Science Foundation ; National Key Research and Develop- ment Program of China |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/57901] |
专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
通讯作者 | Su, Li-jun |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.CAS, China Pakistan Joint Res Ctr Earth Sci, HEC, Islamabad, Pakistan 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Dong, Zhi-bo,Su, Li-jun,Hu, Bing-li,et al. Friction behaviors and flow resistances of rock-ice avalanches[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2024,220:12. |
APA | Dong, Zhi-bo,Su, Li-jun,Hu, Bing-li,&Miao, Shuai-sheng.(2024).Friction behaviors and flow resistances of rock-ice avalanches.COLD REGIONS SCIENCE AND TECHNOLOGY,220,12. |
MLA | Dong, Zhi-bo,et al."Friction behaviors and flow resistances of rock-ice avalanches".COLD REGIONS SCIENCE AND TECHNOLOGY 220(2024):12. |
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